Vulnerability in Opc Foundation Ua .Net Standard
CVE-2020-8867
This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of OPC Foundation UA .NET Standard 1.04.358.30. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of sessions. The issue results from the lack of proper locking when performing operations on an object. An attacker can leverage this vulnerability to create a denial-of-service condition against the application. Was ZDI-CAN-10295.
Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)
EPSS: 0.026 (83.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Opc Foundation Ua .Net Standard — versions 1.04.358.30
- Opcfoundation Unified_architecture_.net-standard
Weakness classification (CWE)
References
- zdi-disclosures@trendmicro.com (VDB Entry, Third Party Advisory, x_refsource_MISC)
- zdi-disclosures@trendmicro.com (x_refsource_MISC, Vendor Advisory)
Frequently asked questions
- What is CVE-2020-8867?
- CVE-2020-8867 is a high-severity vulnerability in Opc Foundation Ua .Net Standard, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 7.5/10. Published 2020-04-22.
- How severe is CVE-2020-8867?
- High severity. CVSS v3 base score is 7.5 out of 10.